Photoproduction of
and
mesons off
nucleons close to threshold
B. Borasoy 1
Physik Department, Technische Universität München,
D-85747 Garching, Germany
Received: 17 March 2000
Communicated by A. Schaefer
Abstract
The importance of Born terms and resonance exchange for
and
photoproduction off both the
proton and neutron
within U(3) baryon chiral perturbation theory is investigated.
Low-lying resonances such as
the vector mesons and
JP= 1/2+, 1/2- baryon resonances are included
explicitly and their contributions together with the Born terms are
calculated. The coupling constants of the resonances are determined from strong
and radiative decays. We obtain reasonable agreement with experimental data
near threshold.
PACS
12.39.Fe Chiral Lagrangians
- 13.60.Le Meson production
Copyright Società Italiana di Fisica, Springer-Verlag 2000